Cooling attachment for explosive-engines.



S. S. SCOTT. COOLING ATTACHMENT EOE EXELosIvE ENGINES.

v APPLICATION FILED JULY 24, 1909.

Patented 0011.25, 1910.

SEMPLE S. SCCT'1,OF CHICAGO, ILLINOIS.

COOLING ATTACHMENT FORv EXPLOSIVE-ENGINES- A Specification of LettersPatent.

Patented oet. 25, 1910.

' Application led July 24, 1909. Serial No. 509,256.

To all whom 'it may concern:

Be it known that I, SEMPLE S. SCOTT, a citizen of the United States, anda resident of Chicago, `in thecounty of Cook and State of'Illinois,have' invented certaink new and. useful Improvements in CoolingAttachments for Explosive-Engines; and I do hereby declare that thefollowingis a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

This invention relates to improvements in explosion motors and moreparticularly to means attached to such a motor for delivering air to itscylinder to cool and thoroughly clean the same during the operation ofthe engine.

The invention consists in the matters hereinafter set forth and moreparticularly pointed out in the appended'claims.

The drawing is a view in vertical crosssection of an engine embodying myinvention. e i,

In the said, dra\ving,` the parts relating to this invention are shownas aiplied to an engine of the horizontal, oppositely disposed cylinder,four cycle type. Briefly described, said engine comprises two'horizontally arranged opposed cylinders 5 and G attached to and openinginto a crank casing 7. Said crank casing contains the crankshaft Sandvalve operating gears 9 and "10.

The gear 9 is attached to the crank-shaft 8 and t-he gear 10 is securedto a rotating shaft 11 in the upper part of the crank casing. Mountedupon said shaft 11 4is a. cam 12 which, in the rotation. ofsaid shaft,alternately engages the inner ends of operat- -ing rods 13, 13 which areoperatively conbetween the ends of the' 'cylinders 5 and 6 and openthrough. the walls thereof.

Intake valves 17v casing which is preferably cylindrical in,

shape is provided through its side wall with ports or openings throughwhich air enters said casing. The valve 31,-which is of the ordinarymushroom type, bears against a seat formed upon the inner face of theupper wall of the crank casing and forming a` port opening into thevalve casing 30. The valve stem 32, which is attached to the valve disk31 projects outwardly. through a guide passage formed in the upper endof the valve casing 30 and is' provided at its outer end with anactuating coil spring 33 which is adapted to close the valve. The valvethus arranged is opened by the suction or vacuum created during thecompression and scavenger strokes of the piston and is closed by theaction of the spring thereon during the impetus and intake strokes ofthe piston. 'lhe air thus taken into the crank casing during the openingof the intake valve is compressed in the crank casing during the impetusand intake strokes of the piston and is forced into a storage tank 3Gwhich is mounted upon said crank casing. Said casing is carried upon theupper end of a tubular neck 37 which opens into said crank .casing andcommunication between the two is controlled by means of Aan upwardlyopening check-valve, the disk 3S of which is adapted to bear upon a seatformed in the upper end of said neck 37 at its junction with the storagetank 3G. Below said valve seatA is provided a downwardly extending guidestem 39 through which lthe stem 40 of the valve extends; said stem being4surrounded by an actuating coil spring 41 which is adapted to closesaid valve in the usual manner. yAs will be seen from this construction,t-he check-valve controlling the which the air intake valve is closed,and as automatically opened simultaneously with the opening of theexhaust valve. As shown in the drawing` each of these valves fordelivering. the air into the engine cylinders comprises two chambers 44and 45, the chamber 44 being connected with the storage tank 36 by apipe 46 and the chamber 45 chamber 44.

with the engine cylinder by means of a pipe 47. Said pipe 47 isconnected at its upper end with said chamber and at its 'lower cnd witha chamber 48 which is formed integrally with the engine cylinder andwhich opens into the interior thereof through a series of ports 50, 50,said ports being arranged in a row, along the head end of the cylinderequal to the length of the piston stroke. The chambers 44 and 45 areseparated by a wall 51 provided with a port opening 52 adapted to beclosed by a valve disk 53. A valve stem 54, attached to said disk,projects outwardly from the chamber 44 through a guide passage formed ina lug located upon the outer side wall of the Said lug extends towardthe crank casing and is surrounded bv a spring 60, the inner end otwhich bears against the outer wall of the chamber 44 and the outer endof which bears against'a pin Glv extending transversely through theouter end of the valve stem 54. The valve disk 53 is moved inwardly topermit the air from the storage tank 36 to enter the engine cylinderbymeans of an arm 65 which is secured to and extends upwardly from theexhaust valve operating rod 13. Said arm is provided onits upper endwith an inturned portion which is adapted to engage the outer end of-the valve stem 54 to open the air control valve simultaneously with theopening of the exhaust valve. While the valve for controlling thedelivery of air from the storage-tank into the engine cylinder isyherein shown and described as mechanically operated, same may beoperated as a check valve by the suction created by theA .plston in thescavenger stroke.

As will be seen from this construction, the air which 1s contained inthe storage tank will, upon the scavenger stroke of the engine, beforced into the engine/'cylinder just ahead of the This fresh cool airwill drive the burned gases out through the exhaust port of the cylinder66 and will thoroughly clean the cylinder and at the same time will coolthe cylinder, piston and valves.

The arrangement herein shown Aand de-` scribed for cooling and cleaning`thel engine cylinder may .be applied to any style or type of explosivemotor and, when used,

water cooling accessories may be. dispensed with, inasmuch as the airthus introduced into the cylinder maintains its parts at a sutlicientlylow` temperature 'to insure an ehcient operation of' the engine.

I claim as my invention rl l. In an explosion motor, in combination withthe crank casing, the power cylinder, the exhaust valve, and the rod for-opening said exhaust valve, a check valve through which `air is takeninto the crank casing,- a Storage tank adapted t0 receive air from thecrank casing -a pipe connection between said storage tanland the powercylinder, av valve casing in said pipe connection provided with twochambers opening into each other, a valve adapted toclose theopeningbetween said chambers, said valve having a stem projectingthrough the wall of said valve casing, and an arm attached to theexhaust valve operating rod adapted to engage said valve stem to openthe valve in the pipe connection.

2. In an explosion motor, the combination with a crank casing, a powercylinder which is provided near oneend with a longitudinally arrangedrow of ports, an exhaust valve for said cylinder and operating mechanismfor sai valve, of a checkrvalve through which air is taken into thecrank casing, a storage tank adapted to receive the air fron'rthe crankcasing, an air vchamber formed integrally with the power cylinder andcovering the longitudinally arranged row of ports therein, a pipeconnection adapted to deliver air from the storage tank into the airchamber upon the cylinder wall, and a valve located in said pipeconnection and adapted to be opened simultaneously with the opening ofthe exhaust valve of .the engine.

3. In an explosion motor, in combination with the power cylinder, theexhaust' valve Yand operating mechanism for said exhaust 'on one sidethereof, a storage tank containing compressed air, and means controlledby the operatin mechanism of the exhaust valve for de ivering air fromsaid storage chamber Vto said ports in the side of the cylinder upon thescavenger stroke y'of the engine.

4. In an explosion motor, in combination with the crank casing, the'power cylinder, the engine piston, the exhaust valve andthe valvecontrolling mechanism, an intake valvein the crank casing which isopened by the vacuum created in the crank casing at the outer stroke ofthe piston, an ,air storage tank opening into said crank casing, a valvecontrolling the inlet opening of said tank, said valve being opened bythe pressure of air in the crank casing, a re exhaust port located ,nearthe inner end of the cylinder, and means controlled by the exhaust valveoperating mechanism for delivering ainffrom the tank into lthe powercylinder in advance of the piston as it travels toward the outer end ofthe cylinder on its scavenger stroke.

5. In an explosion motor, in combination Withy the crank casing, thepower cylinder, theuexhaust valve for said power cylinder and theoperating rodforopening said exhaust valve, a fire exhaust port locatednear the inner end of said cylinder, a check-valve through which air isdrawn into the crank casing, a storage tank which receives the air lfromsaid crank casing, a pipe connecting said tank With'said power cylinderat a point or pointsinterrnediate of the ends of said cylinder, acontrol valve in said pipe em- 15 bracing a valve and stem therefor, andan arm securedto the exhaust valve operating rod adapted 'to engage theend of said valve stern to open said control Valve.

In testimony, that I claimthe foregoing 20 as my invention I aflix mysignature in the presence of two Witnesses, this 21st day of July A. D.1909.

y SEMPLE s. sooTT.

Witnesses: CLARENCE E. MEHLHOPE, GUYM. CAMPBELL.

